Blender keeps on saying "Not responding"
I was having this same problem yesterday. I use an older system (AMD Phenom 9850 with 8GB Ram, Windows 10 x64 Pro) and I was using the video editing functions, but things were horribly unstable. When working with Blender, I close every application I can to reduce the CPU/Memory load, and this helps tremendously, but yesterday it didn't help. Every few clicks and things would stop responding. Add a clip, not responding. Remove a clip, not responding. Save the project, not responding. It was terribly frustrating. I "solved" this by turning off Malwarebytes (malware protection) and pausing ESET (virus protection.) I hate that as a "solution", but it worked for me.